# --coding:utf-8--
prompt = "\nPlease enter the name of a city you have visited:"
prompt += "\n(Enter 'quit' when you are finished.) "
while True:
    city = raw_input(prompt)
    if city == 'quit':
        break
    else:
        print("I'd love to go to " + city.title() + "!")

# 首先， 创建一个待验证用户列表
# 和一个用于存储已验证用户的空列表
unconfirmed_users = ['alice', 'brian', 'candace']
confirmed_users = []
# 验证每个用户， 直到没有未验证用户为止
# 将每个经过验证的列表都移到已验证用户列表中
while unconfirmed_users:
    current_user = unconfirmed_users.pop()
    print("Verifying user: " + current_user.title())
    confirmed_users.append(current_user)
    # 显示所有已验证的用户
print("\nThe following users have been confirmed:")
for confirmed_user in confirmed_users:
    print(confirmed_user.title())

responses = {}
# 设置一个标志， 指出调查是否继续
polling_active = True
while polling_active:
    # 提示输入被调查者的名字和回答
    name = raw_input("\nWhat is your name? ")
    response = raw_input("Which mountain would you like to climb someday? ")
    # 将答卷存储在字典中
    responses[name] = response
    # 看看是否还有人要参与调查
    repeat = raw_input("Would you like to let another person respond? (yes/ no) ")
    if repeat == 'no':
        polling_active = False
# 调查结束， 显示结果
print("\n--- Poll Results ---")
print  responses;
for name, response in responses.items():
    print(name + " would like to climb " + response + ".")
